The world is far too complex, and variation between societal types is too vast, for a categorisation dividing it into two mutually exclusive kinds of… - Thomas Hylland Eriksen

The relation between the social sciences and the natural sciences has long been fraught with difficulties. A minority of social scientists (including some anthropologists) regard their activity as an extension, or a branch, of biological research. Others argue that the social sciences ought to be sciences of the same kind as the natural sciences; that they should strive after the same kind of precision and the same kind of parsimonious clarity that can be achieved for instance in chemistry.

Both evolutionary scientists and anthropologists, who approach the phenomena from very discrepant points of view, have, in other words, reached the conclusion that reciprocity, which creates enduring social bonds based on trust and mutual obligations, is a fundamental aspect of human life.

In my view, there are many exciting possibilities for cooperation between social and cultural anthropologists on the one hand, and scholars with a biological perspective on the other, but they are often lost in aggressive academic turf wars and a failure to engage seriously with each other’s points of view.